Kingdom of Hungaryball was a part of the Habsburgball. For a while, the throne over Hungary would be contested by two crowned Kings (one Habsburg and another being a Hungarian noble), but this problem would be settled after John Sigismund Zápolya abdicated leaving Holy Roman Emperor Maximilian II as the victor.
Eventually Habsburg Hungaryball would attempt to rebel against Austrian Empireball twice, but while this failed all entirely, it would make Austria strike a deal with Hungaryball that would lead them to fuse together into Austria-Hungaryball.